Commit a6f91643 authored by Ariel D'Alessandro's avatar Ariel D'Alessandro Committed by Thomas Petazzoni
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axfs: add new filesystem type 

The Advanced XIP File System is a Linux kernel filesystem driver that
enables files to be executed directly from flash or ROM memory rather
than being copied into RAM. It has the ability to store individual
*pages* in a file uncompressed/XIP or compressed/Demand Paged.

This commit only adds support for 'XIP all' mode, so all the files that
have the execute attribute set will be XIP'ed.

At the moment, the FS is not supported in Linux mainline (v4.3-rc5), so
the kernel has to be built with the axfs patches to be able to read it.
Patches can be found here: https://github.com/jaredeh/axfs



[Thomas: rewrap Config.in help text.]

Signed-off-by: default avatarAriel D'Alessandro <ariel@vanguardiasur.com.ar>
Signed-off-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
parent 653cc68e

fs/Config.in

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menu "Filesystem images"



source "fs/axfs/Config.in"

source "fs/cloop/Config.in"

source "fs/cpio/Config.in"

source "fs/cramfs/Config.in"

fs/axfs/Config.in

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config BR2_TARGET_ROOTFS_AXFS

	bool "axfs root filesystem"

	help

	  The Advanced XIP File System is a Linux kernel filesystem

	  driver that enables files to be executed directly from flash

	  or ROM memory rather than being copied into RAM. It has the

	  ability to store individual *pages* in a file

	  uncompressed/XIP or compressed/Demand Paged.



	  So far, the only supported mode is 'XIP all', so all the

	  files that have the execute attribute set will be XIP'ed.



	  At the moment, the FS is not supported in Linux mainline

	  (v4.3-rc5), so the kernel has to be built with the axfs

	  patches to be able to read it. Patches can be found at:



	    https://github.com/jaredeh/axfs

fs/axfs/axfs.mk

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################################################################################

#

# Build the axfs root filesystem image

#

################################################################################



ROOTFS_AXFS_DEPENDENCIES = host-axfsutils



define ROOTFS_AXFS_CMD

	$(HOST_DIR)/usr/bin/mkfs.axfs -s -a $(TARGET_DIR) $@

endef



$(eval $(call ROOTFS_TARGET,axfs))